“Reddit’s ranking algorithm often pushed flash-in-the-pan controversial threads to the top of the page, displacing threads with deep, meaningful conversations. The metric for success on the subreddit—a “delta,” which represents a view that’s been changed—wasn't built into the design; someone hacked together a “delta bot” to keep track, but it required users to copy-and-paste the symbol or type out the string of Unicode characters to produce it.”